You must think I am a high-priced man.... Fifteen dollars is enough for the job. I send you a receipt for fifteen dollars, and return to you a ten-dollar bill.

The only security a man can ever have is the ability to do a job uncommonly well.

When you lack interest in the case the job will very likely lack skill and diligence in the performance.

The president is the cube of ice one places in the pot of a houseplant, providing a steady amount of nourishment over the course of a hot day. A good description of the job and also a fantastic bit of practical household advice.